The first study, which was commissioned by the charity Farming and Countryside Education, found the GDA label to be the most recognisable and influential among more than 1000 secondary-school children.
When shown eight different food labels, 85% of the children recognised the GDA label, while 69% recognised the traffic-light scheme.
The GDA system was also identified as the most helpful when it came to making purchasing decisions, with the Fairtrade logo squeezing the traffic-light scheme into third place.
A second survey, commissioned by the FDF, asked readers of Take a Break to identify and interpret sample GDA labels. Of the 4000 respondents, 84% had heard of the scheme, 93% found them easy to understand and 86% interpreted their nutritional information correctly.
The research comes as the Food and Drink Federation rolls out a series of advertorials and leaflets as part of its 'What's inside guide' work.